4. OpenMV4 plus脱机运行报错
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    • OpenMV4 plus脱机运行报错

    • W

      在IDE上正常运行，脱机运行后出现了ERROR_log文件
      报错内容是SDRAM failed testing!
      代码如下

      enable_lens_corr = False # turn on for straighter lines...

import sensor, image, time
from pyb import UART
import ujson

sensor.reset()
sensor.set_contrast(3)
sensor.set_pixformat(sensor.GRAYSCALE) # grayscale is faster
sensor.set_framesize(sensor.QVGA)
sensor.skip_frames(time = 2000)
clock = time.clock()
uart=UART(3,9600)

# All line objects have a `theta()` method to get their rotation angle in degrees.
# You can filter lines based on their rotation angle.

min_degree = 0
max_degree = 179

rx1_l=[]
rx2_l=[]
ry1_l=[]
ry2_l=[]

rx1_r=[]
rx2_r=[]
ry1_r=[]
ry2_r=[]

# All lines also have `x1()`, `y1()`, `x2()`, and `y2()` methods to get their end-points
# and a `line()` method to get all the above as one 4 value tuple for `draw_line()`.

while(True):
    clock.tick()
    img = sensor.snapshot()
    if enable_lens_corr: img.lens_corr(0.7) # for 2.8mm lens...

    # `threshold` controls how many lines in the image are found. Only lines with
    # edge difference magnitude sums greater than `threshold` are detected...

    # More about `threshold` - each pixel in the image contributes a magnitude value
    # to a line. The sum of all contributions is the magintude for that line. Then
    # when lines are merged their magnitudes are added togheter. Note that `threshold`
    # filters out lines with low magnitudes before merging. To see the magnitude of
    # un-merged lines set `theta_margin` and `rho_margin` to 0...

    # `theta_margin` and `rho_margin` control merging similar lines. If two lines
    # theta and rho value differences are less than the margins then they are merged.

    for l in img.find_lines(threshold = 2800, theta_margin = 35, rho_margin = 35):
        if (min_degree <= l.theta()) and (l.theta() <= max_degree):
            img.draw_line(l.line(), color = (255, 0, 0))
            # print(l)
            #print("x1:",l.x1,"x2:",l.x2)
            #print(l.theta())
            #k=(l.y1()-l.y2())/(l.x1()-l.x2())
            if(l.x1()<125 and l.theta()<45):
                rx1_l.append(l.x1())
                rx2_l.append(l.x2())
                ry1_l.append(l.y1())
                ry2_l.append(l.y2())
                #print("left:",l.theta())
                #print(l.x1(),l.y1(),l.x2(),l.y2())
            if(l.x1()>125 and l.theta()>135):
                rx1_r.append(l.x1())
                rx2_r.append(l.x2())
                ry1_r.append(l.y1())
                ry2_r.append(l.y2())
                #print(l.x1(),l.y1(),l.x2(),l.y2())

            if rx1_l:
                if rx1_r:
                    A_1=ry2_l[-1]-ry1_l[-1]
                    B_1=rx1_l[-1]-rx2_l[-1]
                    C_1=rx1_l[-1]*(ry1_l[-1]-ry2_l[-1])+ry1_l[-1]*(rx2_l[-1]-rx1_l[-1])
                    A_2=ry2_r[-1]-ry1_r[-1]
                    B_2=rx1_r[-1]-rx2_r[-1]
                    C_2=rx1_r[-1]*(ry1_r[-1]-ry2_r[-1])+ry1_r[-1]*(rx2_r[-1]-rx1_r[-1])
                    cross_x=(B_1*C_2-B_2*C_1)/(B_2*A_1-B_1*A_2)
                    if(cross_x>0 and cross_x<320):
                        rcx=cross_x-125
                        print(cross_x-125)
                        rxy={"rx":rcx,"ry":0}
                        uart.write(ujson.dumps(rxy)+'\r\n')


    #print("FPS %f" % clock.fps())

# About negative rho values:
#
# A [theta+0:-rho] tuple is the same as [theta+180:+rho].
      0
    • W

      另外还有一个问题，我又两个Openmv4 plusi，出现报错的这台插入SD卡后无法被电脑识别

      0

    • 可以联系卖家维修。

      0